SCC Depth Risk — SCE Dermatology MCQ

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HardSkin CancerSCC Depth RiskSCE Dermatology

A cutaneous squamous cell carcinoma on the ear measures 18 mm but invades to a depth of 6 mm. Which feature determines its risk category?

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Correct answer: A — Depth beyond 4 mm makes it high risk

Tumour depth beyond 4 mm is a high-risk feature for cutaneous squamous cell carcinoma even when the surface diameter is below 20 mm. Ear location also increases concern. Risk stratification guides margin control, multidisciplinary review, nodal assessment and follow-up rather than relying on diameter alone.

Reference: https://www.nice.org.uk/guidance/conditions-and-diseases/cancer/skin-cancer